Intend to revert golang-google-grpc in unstable

[Shengjing Zhu <zhsj@debian.org>]

Hi zigo,

You golang-google-grpc 1.38.0 to unstable, which was experimental previously.
It's great to see you want to work on this transition. But I fail to
see the following work to make golang-google-grpc migrate to testing.
Besides, you drop the protoc-gen-go-grpc binary package without any
explanation.

Could you keep exploring this transition in experimental? There's
pseudo regression reports for experimental.
https://qa.debian.org/excuses.php?experimental=1&package=golang-google-grpc
Please take a look at this package before uploading to unstable. There
are many regressions for your golang-google-grpc 1.38.0 upload. (Since
the version in experimental has been cruft, so the page is blank
currently).

-- 
Shengjing Zhu